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Old Family

Featured on September 11, 2014

Thousands of stars shine in the packed core of M15, a globular cluster that contains more than 100,000 stars, in this Hubble Space Telescope image. At about 12 billion years, the cluster's stars are some of the oldest in the galaxy. Most of the stars are small and faint, although one occasionally flares much brighter as it nears the end of its life. Through binoculars, the cluster looks like a small, fuzzy patch of light well on the upper right of the Great Square of Pegasus on September evenings. [NASA/ESA]